Miner&#39;s safety and other inclosed portable lamp.



No. 829,757. PATENTED AUG. 28, 1906 W. BEST. 4

MINERS SAFETY AND OTHER INGLOSED PORTABLE LAMP.

' APPLICATION FILED JAN. so. 1906.

in illmmmn UNITED STATES PATENT OFFICE.

WILLIAM BEST, OF MORLEY, ENGLAND.

Specification of Letters Patent.

Patented Aug. 28, 1906.

Application filed January 30, 1906. Serial No. 298.604.

To all whom, it may concern:

Be it lUlOWIl that I, WILLIAM BEST, a subject of the King of Great.Britain, residing at Morley, in the county of York, England, haveinvented certain new and useful Improvements in Miners Safety and otherInclosed Portable Lamps, of whichthe following is a specification.

Miners safety lamps are usually constructed with a base portion forholding theoil and wick of the lamp and an upper portion comprising thelamp-frame with the gauze and the bonnet, while the lower and upper por.tions of the lamp-frame are connected by vertical pillars, which inclosethe annular glass through which the light from the flame is thrownradially outward. The light which is thus diffused from lamps of this orsome' what similar construction is 'in the form of a radial belt, which,although increasing in depth in proportion to its distance from thelamp, leaves the space immediately below and above the lamp in darkness.The obscuringof the ground below the lamp, which is caused by the lightfrom the wick beingobstructed by the base portion before referred to, isa great disadvantage, because when the lamp is being carried the groundimmedi ately in front of the bearer is obscured, while for mine work,although the horizontallythrown light is suitable for working on theface of the coal, yet it is unsuitable for illuminating the grounditself.

Now the object of this invention is to construct a lamp which whilethrowing out light horizontally around thelamp also throws a portion ofthe light downward, so as to illu- IIminate the ground below the levelof the amp.

The nature of the invention being described in connection with minerssafetylamps, the ap lication to other inclosed portable lamps wi 1 beobvious.

In carrying this invention into effect the base portion of the lamp ispreferably constructed in an annular form, having a conical aperturethrough the center, the apex of the cone being situated adjacent to thesource of light of the lam The oil-chamber is formed by the annular owerportion and the conical wall, and the Wick-tube or wick-tubes whichcarry the wi ck or wicks from the oil-chamber protrude from the uppersurface of the base portion, and they may project inward, so as to bringtheir flame over the central aperture referred to. The conical apertureis closed entering the combustion-chamber of the lamp, except by thegauze-protected entrances.

lamp may be readily understood, I will proceed to describe. the samewith reference to the accompanying drawings, wherein Figure l'is'avertical section of a miners.

safety-lamp constructed in accordance with my invention, and Fig. 2 is asectional plan taken on the line A B of Fig. 1. Fig. 3 is a detail view.

Referring to Figs. 1 and 2 of the drawings, the lamp-frame compriseslower and upper portions 1 2, connected together by vertical pillars 3,which inclose the annular glass 4. 5 is the bonnet, which is attached tothe upper portion 2 of the lamp-frame. 6 is the gauze, arranged Withinthe bonnet 5, and 7 is the following-up ring for carrying and fixing theglass 4 and the gauze 6 in position within the lamp-frame, all ofordinary construction.

According to this invention the base portion of the lamp consists of anoil-chamber 8 of annular form, having a conical aperture 9 through thecenter, the apex of the cone being situated adjacent to the source oflight of the lamp.

10 10 are wick-tubes carrying wicks 11 11 from within the oil-chamber 8,which wicktubes 10 10 protrude from the upper surface of the oil-chamber8 and project inward, so as to bring their flame over the centralaperture 9 referred to. The aperture 9 is closed at the top by means ofa glass or lens 12, carried in a screw-ring 13, screwing into a flangeformed in the upper surface of the oil-chamber 8, which glass or lens 12allows the light of the lamp to pass through the aperture 9 to beneaththe lamp, and thus extend or concentrate the light in a downwarddirection to the required degree, while it prevents gas or air fromentering the combustion-chamber of the lamp except by way of the gauze6. The wick-tubes 10 10 are attached to disks 14 14, which are receivedin recesses formed in the upper surface of the oil-chamber 8, and thedisks 14 14, holding these wick-tubes 10 10, are firmly held down bymeans of screw-rings 15 15, while the lower ends of the wick-tubes '6 5In order that the construction of such a- IIO 10 10 are receivedinapertures 16 16, formed in the bases of the recesses.

It will be seen in employing the aboved.escribed construction'ofvlampthat the light is not only thrown out horizontally around the lamp, butalso in a downward direction, so as to 'illuminate the groundbeneath'the lamp, thus obviating the disadvantages first hereinbeforereferred to.

Instead .of employing .a straight annular glass 4,-asshown.at:Fig.1,'I,may-employ.an annular glass-4, .formed with a shouldera", as shown:at Fig. :3, Whichshouldereforms, a circular reflector :for ;;thepurpose .of receiving light ifrom :ithe =fla1ne of 1the lamp and.throwing v the same;.downward :through :the 'central aperture9,-so;as:to.assi-stin illuminating that portion of the ground beneaththe lamp ,;and

. this reflector; canbe made ibyrdep ositing silver on ;.the shoulder 4itself and protecting it :by a .metal hood, :asshownat 4*, or the.reflectorcan :be rconstructed separatelyand be appliedieither'withinOTOUESIdGKthG shoulder 4 ofrtheeglass 4. Theiinteriori surface of theconical aperture 9 Iain the: oil-chamber- -8 may be made ,:.to reflectlight, Eif: desired.

What'I claim as my invention anddesire 1 to secure iby Letters :Patent,lis- :1. A minerssafety' or otherinclosedportable lamp providedwithwa'base .portion :or

oil-chamberaoflannulanor otheriforrn ihaving a central conical apertureclosed at the @top by one or more glasses .or lenses, .said. oilchamberbeing provided with one or more wicketubes protruding and projectinginward so-as,:to bringatheir fiame-overrthesa'id glasses ing a centralconical aperture closed at the top by a glass or'-lens,saidroilchambenbeing provided with ;two ..Wl0l'tllb6S arched radially inward so,asto' bring-theirflame over the .saidglass orlens which allows the lightofthe lamp to pass downward :through Jthe conical aperture to beneaththe lamp, substantially asidescribed.

3. In a miners safetyelamp,rthercombinar tion withzthelamp-framegbonnet, gauze, annular i lass and .IfolloWing-up zring, 10f.a "base portion or oil-chamberof annular dormhavingla central-conicalapertureclosed at Lthe topbya glass or:lens,.-said oil-chambenbeingprovided with two xwicketubes arched radially inward so astobringtheirlflame overlthe said glass; orrlens which allows athelig'ht. ofzthelamp to .pass downward =through the conical aperture :to beneath ithe:lamp, together with means for assisting the downward illuminationthrough the conical aperture, vsubstantiallyzasdescribed.

In witnessiwhereof @I have'hereuntoset rmy handin. the presence of twowitnesses.

\ WVHJLIAM BEST. Witnesses \GRHREITH BREWER, v JOHN J ow-Er'r.

